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15, Mar 2023
Advanced Printed Circuit Boards

There are many different types of printed circuit boards that might fall under the title of “advanced PCB”. The range of boards that might fit the title of boards include those that are high density interconnect (HDI), controlled impedance, aluminum clad, flex, rigid flex, blind-and-buried or any combination of these. Nearly every type of industry has some type of (PCB) that will fit this description. Each of these circuit board types has challenges associated with design, https://www.hemeixinpcb.com/turn-key-pcb-assembly.html fabrication and assembly. Many circuit boards that would have been considered advanced PCB adecade ago won’t make the list today which indicates that this term is dynamic.

High density PCB seem to be at the top of the list when advanced PCB are discussed. Projects continue to get more complex and the consumer expects the size of its products to decrease which drives the need for circuit boards that are more densely populated. Designers are forced to packing more and more circuitry into less and less space. This creates significant challenges for both the PCB fabricators and the CB assemblers. The CB fabricators are dealing with the issues of ever shrinking trace widths, blind-and-buried vias, via in pad, and decreased annular rings.

The high power LED market has increased the need for advanced PCBs clad with aluminum. These specialized CB are designed to aid the transfer of heat away from the LEDs. They are a combination of printed circuit and heatsink. Horizon Printed Circuits can help design these advanced PCB as well as fab and assemble them.

Controlled impedance has become more the rule then the exception and yet it qualifies as a type of advanced printed circuit board due to the level of care required to get consistently accurate results. The design is only the first challenge. Printed circuit board fab must be completed with a well understood process. The etching must be accomplished without under or over etching. The substrate is also the dielectric and must be held to a reasonable tolerance to assure the expected impedance.

A significant percentage of new products are being designed to use rigid flex PCBs. These CB combine rigid substrates with flexible material to form boards that are rigid and flat in some areas and flexible in others. Many products use these CB to create a three dimensional assemblies that are both electrical and mechanical.

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